diff --git a/html/cgi-bin/vpnmain.cgi b/html/cgi-bin/vpnmain.cgi
index fbc274919..750b69b1d 100644
--- a/html/cgi-bin/vpnmain.cgi
+++ b/html/cgi-bin/vpnmain.cgi
@@ -3338,7 +3338,7 @@ sub make_algos($$$$$) {
 						push(@algo, $int);
 					}
 
-					if ($pfs || $grp eq "none") {
+					if (!$pfs || $grp eq "none") {
 						# noop
 					} elsif ($grp =~ m/^e(.*)$/) {
 						push(@algo, "ecp$1");